[Trac #692] Shutdown notification

[Zarro Boogs per Child]

#692: Shutdown notification
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 Reporter:  marco             |       Owner:  Eben     
     Type:  defect            |      Status:  new      
 Priority:  normal            |   Milestone:  Untriaged
Component:  interface-design  |    Keywords:           
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 Right now, when you press the shutdown button, the system appear to be
 idle for a few seconds, then we switch to text mode and actually shutdown
 after some time. There are a few ideas about it, but we should settle them
 down. We need to implement something for btest-2.

 Possible approaches:

 * Chris was proposing a dialog with the shutdown symbols (I guess
 something like the OS X one?)
 * Dan was proposing to take a screenshot of the screen, grey it out (not
 sure about the exact effect) and put a shutdown symbol on it.
 * Another idea might be to switch back to the Home view, grey it out, and
 show a shutdown symbol instead of the donut.

 Regardless of the exact effect I think these should probably apply:

 * We should never switch to text mode (I'm not really sure if this is
 possible at all, but from an user point of view...)
 * There should ideally be some sort of animation to indicate that the
 system is not stalled (currently the system takes a while to shutdown)

 Eben, what do you think?

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Ticket URL: <http://dev.laptop.org/ticket/692>
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